{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["country of headquarters", "cities of residence", "city of headquarters", "founded by"], "input": "One of his sons studied at the  Amirkabir University of Technology  (  Tehran  Polytechnic ) ."}
{"country of headquarters": [], "cities of residence": [], "city of headquarters": [{"subject": "Amirkabir University of Technology", "object": "Tehran"}], "founded by": []}